Wrench.



H. G. BENNETGH.

WRENCH.

APPLICATION FILED DEG. 20. 1910 amen Wow [Yaw/y (.Zazzmfc/z,

6 new;

HARRY c. BENNE'iGH,'OF COCALICO,PENNSYLVANIA.

WRENCH.

Specification of Letters Patent.

Patented Apr. 9, 1912.

Application tiled December 20, 1910. Serial No. 598,324.

To all whom it may concern:

Be it known that I, HARRY C. BENNETGH, a citizen of the United States,residing at Cocalico, in the county of Lancaster and State ofPennsylvania, have invented new and useful Improvements in renches, ofwhich the following is a specification.

This invention belongs to the rack and pinion class of wrenches and itsobject is to provide a wrench with a quick and simple adjustment and astrong and effective grip. Prominent among its advantages are thatitemploys but a strong single leverinstead of small plier-like handles,and that its grip ping mechanism and its adjusting mechanlsm are one andthe same, so constructed that it can be tighter adjusted withoutremoving the wrench from the nut or pipe operated upon.

In the accompanying drawings are two forms of this invention, which withseveral other forms suggest themselves simultaneously when the primaryidea of. the invention has been grasped.

Figure 1 is aside elevation partly in section. The numeral 1 thereofrefers to the longitudinal bar forming the jaw proper by its rightangular offset 2, and provided cogs 3. The bar 1 provided with.its-faivv2 will be found thus in all wrh ches covered by this patent, but inceigtain designs the cogs 3 ma be relegated to another bar on the otheraw as in Fig. 2 and in some odd forms for special purposes thecogsimaybe found on the opposite side of bar 1. Number 4 represents ahousing. This housing, it

will be noted, varies in form somewhat in' the different forms ofwrenches. Tli'is housing 4 whether of one piece or of several parts isused to provide a mounting for the jaw 14 to provide bearings for theaxle of pinion 5, and to provide a means for mounting the axles ofrollers 16 and 17; and the unillustr'ated. bolts and rivets that arerequired for its firmness and strength. The rollers 16 and 17 are forthe purpose of holding the rack bar in a path to engage the cogs of thepinion. As will be noted, in both illustrations rollers are used forthis purpose, although arranged diifer ently in their positions. While,inactive sleepers may be substituted in cheaper formsof this wrench,this patent limits itself to rollers 1n the matter of anti-frictionaldevices for this purpose. Numbe ,8 is a lever for its operation Thislei-er has bifurcations 7, telescoping the pinion 5 enabling it to usethe axle of said lever as a fulcrum. In all forms of this wrench thelever will; be mounted on the pinion axle and extend no fart-her. Theinner jaw will not be mounted on the lever but to the housing or dog.Within the bifurcations 7 is a pawl 9 pressed by a spring 10. This pawlis not limited to any particular shape and in some instances a lever maycarry two. A pawl may also be placed 1n the housing to prevent recedingmovement of the pinion during the reciprocal motion of the lever. Number11 is a rod for the disengagement of pawl 9. The eyelets 12 are notimportant and can be dispensed with in instances. Number 13 represents afinger-hold which is no feature of novelty but is included forillustrations sake. While preferably the outer jaw is serrated thesespecifications do not aim to specify in the matter of serrations.

Fig. 2 has parts corresponding to those of Fig. 1, only that here theinner instead of the outer jaw is the movable jaw which necessitates theaddition of the cogged-rack bar 18. Also here theoutec aw instead of theinnerjgyvciseo ured to the housing.

()t'her forms may be resorted to without departing from the centraltheme of the invention viz: that of the pinion and reciproeating lever.

I do not wish to limit myself in detail matters like the location ofrivets and bolts for firmness or the certain cut ofthe cogs other thanwhatI am limited by the patents of other inventions.

What I claim is .1. A wrench, one of the essential parts of which beinga toothed wheel, said toothed wheel mounted upon a pinion in a fixedrelative position with one of the jaws, the toothed wheel to engage arack of teeth on the second jaw, so that the revolution of the wheelmoves such jaw to a near or far distance from itself according to thedirection of the revolution, a single lever for said wheel, the end ofwhich is mounted on the same pintle as the wheel, said lever havingmeans whereby it may be secured to the wheel so that by locking thelever in one direction only repeated reciprocal motion of the same will,through the medium of the wheel, move the movable jaw its entire movabledistance.

2. A wrench of the class described comprising a pair of members. one ofsaid memhere comprising a housing formed with a jaw, the secondmembenbeing also provided with a jaw, anti-frictional rollers within thehousing bearing upon the second member, the said housing being providedwith :1 ivoted toothed wheel, a handle having a biurcated extremitymounted upon the pinion of the toothed wheel, a dog carried by thehandle, means for forcing the dog into or out of en agement with thetoothed Wheel, the sec- I on Jaw member having its shank formed withteeth adapted to mesh with the teeth of the toothed wheel, andanti-frictional bear- .ings contacting the upper smooth face of theshank.

3. The herein described construction of wrenches embodying a pair ofmembers, one

of said members having a housing formed with a jaw, the second memberbeingalso provided with a jaw, anti-frictional rollers bearirl'g uponboth of the members, the housing being provided with a pintle, a pivotedtoothed wheel upon the pintle, a lever having a bifurcated extremityloosely mounted upon the pintle for the toothed w eel, and a dog carriedby the lever, spring means for forcin the dog into or out of engagementwith tie toothed wheel, and the first named member having a shankprovided with teeth ada ted to mesh with the teeth of the toot ed wheeland to be forced .into contact with the anti-frictional rollers as thelever is reciprocated.

In testimony whereof I aifix my signature in presence of two witnesses.

HARRY C. BENNETCH.

Witnesses:

PHInLIr BRIGKMANN, J on H. FREESE.

